Ice cream freezer



Feb. 21 1939. D. c. WILLIAMS ICE CREAM FREEZER 2 Sheets-Sheet 1 Filed July 10, 1937 3 Patented Feb. 21, 1939 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to an ice cream freezer, and more particularlyto a device of this kind constructed and adapted to be driven by power operated mechanism.

An object of the invention is to provide a freezer which in'one or more of its forms may be readily attached to and detached from the wringer driving mechanism of a power operated clothes washing machine.

Another object of the invention is to provide a power driven ice cream freezer which is simple in construction, and which is composed of a minimum number of parts.

Another object of the invention is to provide a power driven ice cream freezer adapted to be mounted upon a washing machine in such a position and in which the freezer when mounted on the washing machine, at about waist height, is much lower than other freezers having means 20 for attachment to washing machines, and which is therefore much easier to fill with ice.

Another object of the invention is to provide an ice cream freezer of the type which does not require the removal of the freezer from the washing machine to remove the can of frozen cream from the freezer.

Other objects of the invention will appear hereinafter throughout the specification.

In the drawings:

Figure 1 is aperspective view of my improved freezer showing its position as mounted on a washing. machine.

Figure 2 is a front elevation of a portion of the freezer showing the gear box in vertical section.

Figure 3 is a horizontal section taken on the line 33 of Figure 2.

Figure i is a horizontal section of a modification of the driving gears of the preferred form shown in Figure 2.

Figure is a top plan view of the driving gears of a second modified form of my invention, and

Figure 6 is a plan View of the structure disclosed in Figure 5, the gear box being shown in vertical section.

Referring particularly to Figure 1, the letter A indicates a washing machine having a wringer shaft housing B. Located within the housing 13 is a shaft C driven by the electric motor (not shown), of the washing machine. D is a bracket mounted on the side of the washing machine and supporting the shaft housing B and shaft C. The end of the shaft C is provided with a tongue E which is. ordinarily adapted to fit into a slot of a shaft of the wringer drive mechanism for which the present freezer attachment has been substituted.

The numeral I designates the outside casing of the freezer and the numeral 2 designates the inside casing of said freezer which latter casing is adapted to hold the ice cream mix. Numeral 3 is the cap for said inner casing.

There is the usual drive shaft 4 housed in a gearing 5 for driving the dasher and/or inside casing of the freezer. These parts are supported on the usual cross member 6 which extends across the top of the freezer. The other end of the shaft 4 is retained in a specially cast housing. I having a bearing 8. The housing I is provided with a cap 8 which may be held in position on said housing by screws l0.

The housing is provided with a lower cylindrical extension H which is provided at its bottom with a flat plate l2 attached at l3 to the outside casing. The housing 1 is further provided. with an extension I4 having .an attaching means l5 for attaching the housing at its upper end to the outside freezer casing. The shaft 4 is detachably connected to the shaft l6 by a tongue and slot connection H, which shaft has a beveled gear l8 splined thereon. The ends of the shaft l E are housed in the bearings 8 and 9. This gear I8 is in meshed relation with a second beveled gear l9 splined to a shaft 20. The extension ll provides a bearing for said shaft 20. The lower end of the shaft 20 is provided with a head 2! having a slot 22 which is adapted to be seated upon the tongue E of the wringer shaft. The bottom flat surface of the plate I2 is adapted to rest upon the upper portion of the bracket D, as shown in Figure 1. Suitable means 23 such as pins or bolts are mounted on the plate l2 and extend through apertures (not shown) in the bracket D, to prevent relative rotation of the freezer and washing machine.

The freezer as shown in Figure 1 may be readily detached in its entirety from the washing machine by merely lifting the same so that the pins or bolts are removed from the apertures, the lower end of the cylindrical housing is then raised above the upper end of the shaft C. Such removal of the freezer, however, need only be necessary when it is desired to attach the wringer (not shown) in its usual position above wringer drive shaft housing B. This is for the reason that the entire freezer is located about waist high and is in a very convenient position for the insertion and removal of the inner casing containing the freezing mix before and after the freezing operation; and also for the reason that freshice and salt may be conveniently inserted in the space between the casings l and 2 during the course of the freezing operation as well as before and after freezing when packing the freezer. Moreover, if desired the ice cream may be transferred to a container or dish with the freezer mounted as shown in Figure 1, upon the removal, however, of the parts 3, 4, 5 and 6. All the necessary operations incident to the freezing, packing, or even the dispensing of the ice cream, may be performed without removal of any of the parts from the position, shown in Figure 1, wherein the top of the freezer is slightly above waist height and is in a convenient position for these operations. The driving of the freezer can and dasher, of course, is done entirely by the electric motor of the washing machine, so that when the freezer has been filled with ice cream mix it is only necessary to turn the switch of the washing machine, whereby to drive the wringer shaft C and the freezer parts which it drives. After the freezing operation, the dasher may be removed by removing the parts 3, 4. 5 and 5.

In the modification shown in Figure 4, there is shown a portion 24 of the outside casing of a freezer which is provided with a housing 25 similar to the housing 1 of Figure l. 2.6 is a drive shaft for driving the inside casing and dasher (not shown) and corresponding to shaft 4 in Figure 1. The shaft 21 is adapted to drive shaft 26 and is provided with .a squared portion 28. Shaft 2'! drives shaft 25 by a tongue and slot connection 29 similar to that shown in Figure 2. The tongue and slot connection permits removal of shaft 26 when the .dasher and other parts are taken off the freezer, in the same manner that the shaft 4 of Figure 1 maybe removed. Slidably mounted on the opposite end of the shaft 21 is a beveled gear 30 having a square hole (not shown). in which the squared portion 28 fits. The said gear 30 is freely slidable on the squared portion 28. Beveled gear 30 has a rear plane surface 3|.

There is a rotatable abutment member 32 having a front plane surface 33 in continual contact with the face 3| of the gear 39. The opposite face of the abutment member is provided with a V-shaped projection 34 adapted in one of its positions to fit into a V-shaped notch 36 of a second abutment member 35 rigidly attached to the casing 25. A shaft 37, provided with a handle 38, has its bearing in an aperture of the second abutment member through which it extends and its opposite end is rigidly attached to the first abutment member 32 so that upon rotation of the handle 38, the first abutment member may be rotated until the V-shaped projection rides out of the V-shaped notch. Continued rotationof the handle 38 will bring the V-shaped projection into a position where it will ride on a fiat portion 39 of the second abutment 35. In this position the gear 30 is in meshed relation with a second gear 40 which corresponds to the gear l9 shown in Figure 2.

In the position shown in Figure 4, the gears are out of mesh, the gear 30 having been moved by the spring 4| to a position where the V-shaped projection and notch interfit. Opposite ends of the spring bear against an inner portion of the casing 25, and a collar 42 on the gear 30. The gears will be out of mesh whenever the handle 38 is moved so that the V-shaped projection may be seated in the V-shaped notch. By this means the washer motor may be turned on continuously and whenever it is desired to stop the rotation of the dasher and/or inside casing, the handle 38 need only be rotated to the position shown in Figure 4 whereupon the gears are disconnected. In this position the gear 43 continues to rotate but does not drive the gear 30, shaft 27, shaft 26 and the freezer parts driven thereby.

Figures 5 and 6 disclose a modification wherein the freezer 43, similar to Figure 1, may be stood upon any suitable support, and wherein the drive shaft 44 corresponding to the drive shaft 4 is coupled by means of a tongue and slot connection 41, shown in dotted lines in Figure 5, to a shaft 48 mounted within the housing. Suitable reduction gears 49 and 50 are provided. The gear 50 is mounted on the shaft having a worm gear 52 driven by a worm 53 on motor shaft 54. The numeral 55 is an electric motor driven by a source of electricity (not shown). 51 indicates ears having attaching means 58 for connecting the electric motor to the casing 55.

The construction shown in Figures 5 and 6 provide a very compact arrangement of motor driven ice cream freezing machine where there is an in-- dependent motor provided. The casing 45 and motor 55 may be quickly mounted on an ordinary hand operated freezer, upon removal of the usual crank handle. In this modification the clothes washing machine is not made use of. With the arrangement shown in these figures the dasher, inner casing and shaft i4 may be removed quickly for insertion and removal of ice cream mix and ice cream from the casing 44.

In the claims the term washing machine is intended to include all domestic power operated devices of the type employing a vertical shaft.

I desire to comprehend in my invention all modifications embraced by the attached claim.

What I claim is:

An ice cream freezer comprising an outer casing and an inner casing, driven shaft means comprising a plurality of horizontal shafts detachably connected to each other and adapted to drive said freezer, a housing, an extension below said housing integral therewith, gearing within said housing, a depending vertical shaft located within said extension and connected so as to drive said gearing, one of said horizontal shafts having a connection with said gearing and being adapted said extension having a DAVID CARLYLE WILLIAMS.

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